"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." There's no denying the popularity of the Oura Ring — over two and a half million of these little ...

Basal body temperature (BBT) can help track ovulation, but it's not the most reliable for predicting pregnancy. An implantation dip in BBT isn't a reliable sign of pregnancy, and changes can occur ...

Natural Cycles is the only cycle-tracking app cleared by the FDA as birth control, and it continues to integrate itself with data collected from wearables. Jessica was a writer on the Wellness team, ...

Daysy is a fertility tracker designed for people who want to conceive. It uses a proprietary algorithm and basal body temperature to calculate the daily menstrual cycle in real time. Many people use ...